SCIENTIFIC INSTRUMENTS 21-51-60 B7180_Component service manual
Contents
1. 1 JAN 22 2004 2 BLANK Repair 5 JAN 22 2004 Table of Contents 1 JAN 22 2004 Assembly including 9 JAN 22 2004 2 BLANK storage Introduction 1 JAN 22 2004 Fits and clearances 5 JAN 22 2004 2 BLANK Special tools fixtures 5 22 2004 Description and 1 JAN 22 2004 and equipment operation Illustrated parts list 5 JAN 22 2004 LEP 1 LEP 2 21 51 60 Jan 22 2004 LN COMPONENT MAINTENANCE MANUAL B7180 TABLE OF CONTENTS DESCRIPTION AND oats 1 ven dicar Land ms Iu iE 1 TESTING AND FAULT ISOLATION i th ER SE ERR ER Enid 2 DISASSEMBLY cc O 4 ED 4 M 4 REPAR oid beasts ocean cio Bee acd 5 ASSEMBLY INCLUDING 5 5 FIFS AND OLEARANGES tiene URGES mI PR QUT 5 SPECIAL TOOLS FIXTURES AND 5 ILLUSTRATED PARTS rp bs eu ed leads 5 BAL Page 1 2 21 51 80 Jan 22 2004 COMPONENT MAINTENANCE MANUAL B7180 INTRODUCTION This manual describes the general configuration of the Pack Zone Temperature Control Sensor Model B7180 manuf2. LN SIEUT INIT COMPONENT MAINTENANCE MANUAL TEMPERATURE SENSOR Part Number B7180 Issued by SCIENTIFIC INSTRUMENTS INC 4400 W Tiffany Drive West Palm Beach FL 33407 USA Tel 561 881 8500 Fax 561 881 8556 Page T 1 T 2 BA Sept 1988 21 51 60 Rev 5 Jan 22 2004 REVISION d 2 3 gt COMPONENT MAINTENANCE MANUAL REVISION DATE 11 30 98 04 17 91 03 17 95 11 10 99 01 22 04 B7180 RECORD OF REVISIONS INSERTION REVISION REVISION DATE DATE BA Page RR 1 RR 2 21 51 60 Jan 22 2004 rn w COMPONENT MAINTENANCE MANUAL B7180 RECORD OF TEMPORARY REVISIONS TEMPORARY INSERTED DELETED REVISIONS No DATE REVISION No BA Page TR 1 TR 2 21 51 60 Jan 22 2004 vim cmm COMPONENT MAINTENANCE MANUAL B7180 SERVICE BULLETIN LIST SERVICE DATE REV SUBJECT BULLETIN INSERTED m Page SBL 1 SBL 2 21 51 60 Jan 22 2004 COMPONENT MAINTENANCE MANUAL B7180 LIST OF EFFECTIVE PAGES PAGE DATE PAGE DATE Title Page 1 JAN 22 2004 Specifications 1 JAN 22 2004 2 BLANK 2 Record of revisions 1 JAN 22 2004 Testing and fault 2 JAN 22 2004 2 BLANK isolation 3 4 Record of temporary 1 JAN 22 2004 revisions 2 BLANK Disassembly 4 JAN 22 2004 Service Bulletin List 1 JAN 22 2004 Cleaning 2224 22 2004 2 BLANK Check 4 JAN 22 2004 List of effective pages
3. actured by Scientific Instruments Inc Identification data including part number serial number and FAA PMA data is engraved on the body of the unit This manual is divided into separate sections Title Page Testing and Fault Isolation Record of Revisions Disassembly Record of Temporary Revisions Cleaning Service Bulletin information List Check List of Effective Pages Repair Table of Contents Assembly including Storage Introduction Fits and Clearances Description and Operation Special Tools Fixtures and Equipment Specifications Illustrated Parts List Refer to the Table of Contents for the page location of applicable sections The quantities in this manual are expressed in English units followed by 1 units in parenthesis This manual will be revised as necessary to reflect current information R4 Page INTRO 1 INTRO 2 Jan 22 2004 w COMPONENT MAINTENANCE MANUAL B7180 DESCRIPTION AND OPERATION 1 DESCRIPTION The Pack Zone Temperature Control Sensor consists of two calibrated thermistors which are mounted within a stainless steel housing These thermistors are terminated in 6 hermetically sealed receptacle which connects to the external temperature control system Mounting of the unit is accomplished via an external 5 8 18 threaded section and hex head configuration as shown in Figure 1 2 OPERATION The thermistors respond to changes in air duct temperature and pr
4. ovide an output inversely proportional to these changes The associated temperature controller utilizes this output to regulate the temperature of the duct air Three curved vanes are incorporated in the design of the sensor tip Their function is to protect the thermistors from foreign matter in the airflow while directing the flow throughout the thermistor area This prevents air stagnation which could affect accuracy of the sensor output thermistor to receptacle connections are as illustrated in Figure 1 3 SPECIFICATIONS Receptacle MS3113H10C6P or equivalent per MIL C 26482 Mating Bayonet Plug 53116 1065 or equivalent Weight 3 oz 0 09 kg Size Probe Diameter 0 28 in 7 1 mm Overall Length 4 00 in 101 6 mm maximum Mounting Thread 5 8 18 UNF 3A 21 51 60 PAGE 1 Jan 22 2004 LN vm cm mn COMPONENT MAINTENANCE MANUAL B7180 Mounting Hexagon 1 00 in 25 4 mm across flats This plug is listed for test purposes only and is not necessarily used on the aircraft Scientific Instruments Inc B7180 S N Outline and Schematic Drawing Figure 1 TESTING AND FAULT ISOLATION 4 TESTING AND FAULT ISOLATION A The data that follows permits the testing of the sensor to insure correct operation B Special Tools and Test Equipment 1 A megohmeter capable of reading 5 megohms and greater at 500 VDC AEMC Model 1000 or equivalent 2 Temperature controlled environmen
5. tal test chamber Accuracy 1 3 Thermometer with temperature accuracy 0 2 F x 0 11 4 Ohmmeter with 21 51 60 2 22 2004 w COMPONENT MAINTENANCE MANUAL B7180 Current 0 1 mA Accuracy 0 0596 Range 0 100 KO C Visual Check 1 Visually check the sensor for obvious damage D Insulation Resistance 1 Using the megohmeter measure the resistance between all receptacle pins connected in parallel and the housing The reading should exceed 10 megohms 500 VDC E Electrical Test refer to Figure 2 1 Connect the Ohmmeter to pins A amp B of the temperature sensor Hold the sensor at a temperature of 75 F 10 F 23 9 5 6 C within the environmental test chamber With the thermometer at a stable temperature and located within approximately 1 2 in 12 7 mm of the tip of the sensor measure the temperature Compare this value to that indicated on Figure 3 The value must be within the limits shown on the drawing oen Schematic for Electrical Test Figure 2 21 51 60 PAGE 3 Jan 22 2004 COMPONENT MAINTENANCE MANUAL 7180 Resistance Ohms Temperature Degrees F Resistance vs Temperature Figure 3 5 DISASSEMBLY Not Applicable 6 CLEANING A Remove dirt stains moisture etc with a clean dry lint free cloth B Use a soft bristle brush moistened in isopropyl alcohol to remove any foreign ma
6. tter from between the receptacle pins 7 CHECK A Visually inspect the sensor probe for obvious wear or damage B Check for bent broken or missing receptacle pins 21 51 60 PAGE 4 Jan 22 2004 LN sim olm Ug COMPONENT MAINTENANCE MANUAL B7180 C Check probe housing for scratches or cracks 8 REPAIR The temperature sensor is considered non repairable Bent receptacle pins may be carefully straightened For other defects or incorrect operation the temperature sensor should be discarded 9 ASSEMBLY INCLUDING STORAGE A Assembly Not Applicable B Storage 1 install a protective cap on the electrical connector 2 The sensor must be stored in a clean and dry room open to the air The temperature must be between 64 F and 82 F 18 C and 28 and the relative humidity between 2596 and 6596 3 Keep the sensor in its initial packaging If other containers are put on the sensor container be careful to prevent damage caused by too much weight 4 Do not keep the sensor near heat fluids or other sources that can cause corrosion 10 FITS AND CLEARANCES No dimensional check of the sensor is necessary 11 SPECIAL TOOLS FIXTURES AND EQUIPMENT No other special tools are necessary 12 ILLUSTRATED PARTS LIST Since the unit is non repairable no parts list is provided 21 51 60 22 2004
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SCIENTIFIC INSTRUMENTS 21 51 60 B7180_Component service manual